WO2012133266A1 - Load-resisting structure of multifunctional vibration actuator - Google Patents

Load-resisting structure of multifunctional vibration actuator Download PDF

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Publication number
WO2012133266A1
WO2012133266A1 PCT/JP2012/057687 JP2012057687W WO2012133266A1 WO 2012133266 A1 WO2012133266 A1 WO 2012133266A1 JP 2012057687 W JP2012057687 W JP 2012057687W WO 2012133266 A1 WO2012133266 A1 WO 2012133266A1
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WIPO (PCT)
Prior art keywords
suspension
housing
vibration actuator
magnetic circuit
vibration
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PCT/JP2012/057687
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French (fr)
Japanese (ja)
Inventor
隆行 熊谷
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並木精密宝石株式会社
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Application filed by 並木精密宝石株式会社 filed Critical 並木精密宝石株式会社
Priority to US14/009,081 priority Critical patent/US20140029772A1/en
Priority to CN2012800084434A priority patent/CN103402656A/en
Priority to KR1020137021282A priority patent/KR20130114724A/en
Publication of WO2012133266A1 publication Critical patent/WO2012133266A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
    • B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
    • B06B1/12—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving reciprocating masses
    • B06B1/14—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving reciprocating masses the masses being elastically coupled
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/03—Transducers capable of generating both sound as well as tactile vibration, e.g. as used in cellular phones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • the present invention includes a magnetic circuit unit having a magnet and a diaphragm having a voice coil, and the suspension is used to support the magnetic circuit unit in a housing, and the diaphragm is provided at an end of the housing.
  • the present invention relates to a multi-function vibration actuator having a function of generating a sensory vibration due to vibration of the magnetic circuit unit and an acoustic reproduction function due to vibration of the diaphragm by input to a coil.
  • a multi-function vibration actuator that shares a magnetic circuit part with an acoustic reproduction function and a body vibration generation function is used.
  • Such a multi-function type vibration actuator has a frequency band used when a signal is input to the voice coil, in the vicinity of the resonance frequency between the diaphragm with the voice coil attached and the magnetic circuit unit with the magnet attached to the inner wall of the housing via the suspension. Is set. For this reason, without using a mechanical switching structure, it is possible to switch between sound reproduction due to diaphragm vibration and generation of sensory vibration due to vibration of the magnetic circuit section.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2007-175570
  • Patent Document 2 Japanese Patent Application Laid-Open No. 2009-027679
  • Patent Document 1 While having the effect described above, the structure described in Patent Document 1 has a problem that the step portion for fixing the suspension outer peripheral portion is provided on the cover, and the diameter of the magnetic circuit portion is limited. It was. Further, the multi-function vibration actuator described in Patent Document 2 has a problem that rigidity against external stress is low instead of the limitation. More specifically, in the event of an impact such as dropping, it is possible to prevent contact between the magnetic circuit part supported via the suspension and the voice coil attached to the diaphragm, When a stress is applied from the outside, such as compression, there is a problem that the housing cover falls.
  • load resistance is not considered important because external forces applied to the casing of a mobile phone rarely act on each component.
  • an external force applied to the housing directly acts on the mounted component. For this reason, it is required to improve the load resistance as well as the above-mentioned thinning and impact resistance for large-sized mounting parts typified by multifunctional vibration actuators.
  • the invention described in the present application provides a multi-function vibration actuator capable of improving the load resistance while retaining the advantages of the conventional structure which is improved in thickness and impact resistance.
  • the purpose is to do.
  • a diaphragm having a voice coil attached thereto is fixed to a cylindrical housing, and a magnetic circuit portion is provided inside the housing via a suspension.
  • the multi-function vibration actuator having a dynamic structure in which the magnetic circuit unit includes a magnet
  • the second aspect of the present invention is characterized by a structure in which the protruding suspension and the housing are integrally formed.
  • the multi-function vibration actuator described in the present invention can improve the load resistance against external stress while maintaining the advantages of the structure conventionally used. More specifically, by adopting a structure in which the suspension outer peripheral portion protrudes from the cover, the suspension outer peripheral portion can prevent the housing from falling into the cover.
  • the structure according to the present invention can prevent the housing from dropping due to a uniform load and also prevent the housing from falling due to a non-uniform load. This is because the projecting outer periphery of the housing covers the displacement of the suspension that occurs when an uneven load is applied, and it is possible to improve the stable load resistance regardless of the mounting position in the mounting housing. Become. Further, since the external stress is received by the suspension, it is possible to maintain high durability even in a usage situation where the external stress repeatedly acts.
  • the multi-function vibration actuator according to the present invention has a structure that does not require a new part by providing the above-described effects using a suspension structure. For this reason, it is possible to improve the load resistance while retaining the advantages such as thinning that the conventional structure has.
  • the housing is reinforced by the suspension. For this reason, it is possible to increase the overall rigidity while preventing the housing from falling off due to the external stress.
  • FIG. 1 Overall perspective view of multifunctional vibration actuator used in the best mode of the present invention 1 is a cross-sectional side view taken along the line A-A 'of FIG. 1 is an exploded perspective view of a multi-function vibration actuator used in the best embodiment of the present invention. Enlarged view around the protrusion in Fig. 2
  • FIG. 1 the best embodiment of the present invention will be described with reference to FIG. 1, FIG. 2, and FIG.
  • FIG. 1 is an overall perspective view of the multi-function vibration actuator used in the present embodiment
  • FIG. 2 is a side sectional view taken along the line AA ′ of FIG. 1
  • FIG. 3 is an exploded perspective view
  • FIG. Fig. 2 shows an enlarged view around the protrusion in Fig. 2.
  • some background lines are omitted.
  • the multifunction vibration actuator used in the present embodiment has a structure in which the protruding portion C of the suspension 5 and the housing 4 are protruded from the cover 11. For this reason, when the load in the thickness direction is applied, the suspension 5 receives the load, and the protrusion C can prevent the housing 4 from dropping due to the bending when the uneven load is applied. It was.
  • the multi-function vibration actuator used in the present embodiment includes a sound reproducing unit including a diaphragm 2 and a voice coil 3, a pole piece 6, a magnet 7, a yoke 8, and a weight 9. And has a dynamic structure driven by a magnetic force acting between the suspension 5 and a magnetic circuit portion supported by the housing 4.
  • the magnet 7 is magnetized in the thickness direction, and magnetic materials are used for the pole piece 6, the yoke 8, and the suspension 5.
  • the multi-function vibration actuator described in the present embodiment reproduces sound by setting the input signal to the voice coil 3 to the vibration frequency band of the diaphragm 2 and supports the magnetic circuit unit supported via the suspension 5.
  • the vibration structure is a drive structure that generates a sensation vibration by setting the vibration frequency band of.
  • a structure in which the diaphragm 2 is fixed and sandwiched between the grill 1 and the housing 4 is used.
  • the structure described in this example could suppress the variation at the time of diaphragm bonding and perform good sound reproduction with a stable fixing strength.
  • the structure prevents the inner wall of the mounting housing and the diaphragm 2 from being brought into contact with each other when assembled in the mounting housing, thereby preventing a decrease in sound pressure during sound reproduction. Yes.
  • the voice coil 3 provided in the sound reproducing unit is disposed in the magnetic gap g formed by the pole piece end portion and the inner periphery of the suspension 5. For this reason, it becomes possible to drive with high magnetic efficiency at the time of sound reproduction and vibration generation.
  • a step portion corresponding to the deformation amount of the suspension 5 at the time of experiencing vibration is provided. For this reason, the overall configuration can be reduced without narrowing the movable range of the suspension 5.
  • the weight 9 is formed in accordance with the shape of the step portion on the lower side of the yoke 8 and fixed. For this reason, the fixed area is increased as compared with the conventional cylindrical weight, and it is possible to reduce the drop-off of the weight at the time of impact such as dropping.
  • the fixed portion of the suspension 5 on the upper side of the yoke, it is possible to use a structure in which the inner periphery of the suspension 5 is used as a magnetic path, making the magnetic circuit portion thinner and increasing the amplitude when experiencing vibrations. I was able to get the effect.
  • the suspension outer peripheral portion D integrated with the housing has a structure for reinforcing the strength of the housing portion corresponding to the magnetic circuit portion. More specifically, a structure that prevents contact between the magnetic circuit portion and the voice coil 3 by the housing portion reinforced by the suspension outer peripheral portion D coming into contact with the yoke flange E when receiving an impact such as dropping. It has become. Therefore, not only the impact resistance of the magnetic circuit unit alone but also the effect of improving the impact resistance of the entire drive mechanism can be obtained.
  • the gap f between the inner wall of the cover and the outer periphery of the magnetic circuit portion is reduced in the space below the magnetic circuit portion.
  • the air flow rate is limited. For this reason, it becomes possible to use the air under the magnetic circuit part as a damper, and to stabilize the vibration characteristics when the sensation vibration is generated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Multimedia (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

[Problem] To provide a multifunctional vibration actuator enabling load resistance to be improved while preserving improvements to impact resistance and space-saving performance afforded by a thinner profile. [Solution] An outer periphery section of a suspension is constructed so as to protrude from the housing, making it possible to improve load resistance against external pressure while retaining a thin profile. Configuring the suspension to be integrated with the housing additional yields the effect of reducing the quantity of components and the corresponding number of production requirements, and increasing durability as afforded by the integrated structure.

Description

多機能型振動アクチュエータの耐荷重構造Multi-function vibration actuator load bearing structure
　本発明は、マグネットを有する磁気回路部と、ボイスコイルを有する振動板とを備え、サスペンションを用いて前記磁気回路部をハウジング内に支持し、該ハウジング端部に前記振動板を設け、前記ボイスコイルへの入力によって、前記磁気回路部の振動による体感振動の発生及び、前記振動板の振動による音響再生機能を有する多機能型振動アクチュエータに関する。 The present invention includes a magnetic circuit unit having a magnet and a diaphragm having a voice coil, and the suspension is used to support the magnetic circuit unit in a housing, and the diaphragm is provided at an end of the housing. The present invention relates to a multi-function vibration actuator having a function of generating a sensory vibration due to vibration of the magnetic circuit unit and an acoustic reproduction function due to vibration of the diaphragm by input to a coil.
　現在、携帯電話に代表される移動体通信機器には、着信音の再生又は体感振動によって、使用者に着信を知らせる音響再生機能と体感振動発生機能が設けられている。また、この両機能を単一の素子で追加するために、音響再生機能と体感振動発生機能とで、磁気回路部を共有する多機能型振動アクチュエータが用いられている。 Currently, mobile communication devices such as mobile phones are provided with a sound playback function and a function to generate a sensation vibration to notify the user of an incoming call by playing a ringtone or experiencing vibration. In addition, in order to add both functions with a single element, a multi-function vibration actuator that shares a magnetic circuit part with an acoustic reproduction function and a body vibration generation function is used.
　このような多機能型振動アクチュエータは、ボイスコイルへの信号入力時に用いる周波数帯域を、ボイスコイルを取り付けたダイアフラムと、ハウジング内壁にサスペンションを介して取り付けたマグネットを有する磁気回路部との共振周波数付近に設定している。この為、機械的な切り換え構造を用いることなく、ダイアフラムの振動による音響再生と、磁気回路部の振動による体感振動の発生との切り換えを可能にしている。 Such a multi-function type vibration actuator has a frequency band used when a signal is input to the voice coil, in the vicinity of the resonance frequency between the diaphragm with the voice coil attached and the magnetic circuit unit with the magnet attached to the inner wall of the housing via the suspension. Is set. For this reason, without using a mechanical switching structure, it is possible to switch between sound reproduction due to diaphragm vibration and generation of sensory vibration due to vibration of the magnetic circuit section.
　上記多機能型振動アクチュエータの構造として、出願人は過去に特開２００７－１７５５７０（以下特許文献１として記載）及び特開２００９－０２７６７９（以下特許文献２として記載）記載の構造をそれぞれ出願し、公開されている。ここで、特許文献１及び２に記載の構造は落下等の衝撃を受けた際、磁気回路部とボイスコイルとの接触を防いだストッパ機能を設けた構造となっている。 As the structure of the multifunctional vibration actuator, the applicant has applied for the structures described in Japanese Patent Application Laid-Open No. 2007-175570 (hereinafter described as Patent Document 1) and Japanese Patent Application Laid-Open No. 2009-027679 (hereinafter described as Patent Document 2), respectively. It has been published. Here, the structures described in Patent Documents 1 and 2 are provided with a stopper function that prevents contact between the magnetic circuit unit and the voice coil when subjected to an impact such as dropping.
特開２００７－１７５５７０JP2007-175570 特開２００９－０２７６７９JP2009-027679
　上述した効果を有している反面、特許文献１記載の構造では、サスペンション外周部を固定する段部をカバーに設けており、磁気回路部の径寸法が制限されているという課題を有していた。また、特許文献２に記載の多機能型振動アクチュエータでは、前記制限が無い代わりに外部からの応力に対する剛性が低いという課題を有していた。より具体的には、落下等の衝撃時に於いて、サスペンションを介して支持されている磁気回路部とダイアフラムに取り付けたボイスコイルとの接触を防ぐことを可能にしている一方で、取付筐体の圧迫等、外部から応力が加わった際にハウジングのカバーに対する落ち込みが発生してしまうという課題を有していた。 While having the effect described above, the structure described in Patent Document 1 has a problem that the step portion for fixing the suspension outer peripheral portion is provided on the cover, and the diameter of the magnetic circuit portion is limited. It was. Further, the multi-function vibration actuator described in Patent Document 2 has a problem that rigidity against external stress is low instead of the limitation. More specifically, in the event of an impact such as dropping, it is possible to prevent contact between the magnetic circuit part supported via the suspension and the voice coil attached to the diaphragm, When a stress is applied from the outside, such as compression, there is a problem that the housing cover falls.
　この様な課題について、従来は携帯電話の筐体に加えられる外力が各部品単体に作用することは少なかった為、耐荷重性は重視されていなかった。しかしながら近年、携帯電話の薄型化が進むにつれて、筐体に加えられる外力が直接搭載部品に対して作用する構造となっている。この為、多機能型振動アクチュエータに代表される大型の搭載部品に対して上記薄型化、耐衝撃性向上と共に、耐荷重性の向上が要求されている。 For such problems, conventionally, load resistance is not considered important because external forces applied to the casing of a mobile phone rarely act on each component. However, in recent years, as the mobile phone has become thinner, an external force applied to the housing directly acts on the mounted component. For this reason, it is required to improve the load resistance as well as the above-mentioned thinning and impact resistance for large-sized mounting parts typified by multifunctional vibration actuators.
　以上述べた課題に対して、本願記載の発明では薄型化と耐衝撃性とを向上させた従来の構造が有する利点を残したまま、耐荷重性の向上が可能な多機能型振動アクチュエータを提供することを目的としている。
In response to the problems described above, the invention described in the present application provides a multi-function vibration actuator capable of improving the load resistance while retaining the advantages of the conventional structure which is improved in thickness and impact resistance. The purpose is to do.
　上記目的のために本発明に於ける請求項１記載の発明は、筒型形状を有するハウジングに、ボイスコイルを取り付けたダイアフラムを固着し、前記ハウジングの内側にはサスペンションを介して磁気回路部を取り付けた構造を有し、前記磁気回路部がマグネットを有しているダイナミック構造の多機能型振動アクチュエータに於いて、前記磁気回路部を収納するカバーからサスペンション外周を突出させた状態で、前記ハウジングとカバーとを固着する構造を特徴としている。 To achieve the above object, according to the first aspect of the present invention, a diaphragm having a voice coil attached thereto is fixed to a cylindrical housing, and a magnetic circuit portion is provided inside the housing via a suspension. In the multi-function vibration actuator having a dynamic structure in which the magnetic circuit unit includes a magnet, the housing with the suspension outer periphery protruding from a cover that houses the magnetic circuit unit. It features a structure that secures the cover and the cover.
　また、本発明の第二の態様は、前記突出したサスペンションとハウジングとを一体に成形した構造を特徴としている。
The second aspect of the present invention is characterized by a structure in which the protruding suspension and the housing are integrally formed.
　この様な構造を用いた事で本発明記載の多機能型振動アクチュエータは、従来用いられてきた構造の利点を保ちつつ、外部応力への耐荷重性を向上させることが可能としている。より具体的には、サスペンション外周部をカバーから突出させた構造とすることによって、ハウジングのカバーに対する落ち込みをサスペンション外周部が防ぐことが可能となる。 By using such a structure, the multi-function vibration actuator described in the present invention can improve the load resistance against external stress while maintaining the advantages of the structure conventionally used. More specifically, by adopting a structure in which the suspension outer peripheral portion protrudes from the cover, the suspension outer peripheral portion can prevent the housing from falling into the cover.
　これは、外部応力をサスペンション外周部が受ける構造となる為で、樹脂製のハウジングによって受けていた外部応力を金属製のサスペンション外周部によって受けることで、荷重を受けた際の変形による落ち込みを防止している。 This is because the outer periphery of the suspension receives the external stress, and the external stress that was received by the resin housing is received by the outer periphery of the metal suspension to prevent a drop due to deformation when subjected to a load. is doing.
　また、前記サスペンション外周部をカバーから突出させた構造を用いることで、本発明記載の構造は均等荷重によるハウジングの落ち込みを防止すると共に、不均等荷重によるハウジングの落ち込みをも防止することができる。これは、突出させたハウジング外周部が不均等荷重を加えた際に生じるサスペンションの位置ズレをカバーする為で、取り付け筐体内での搭載位置に左右されない、安定した耐荷重性の向上が可能となる。更に、サスペンションによって外部応力を受ける為、外部応力が繰り返し作用する様な使用状況でも高い耐久性を維持することが可能となる。 In addition, by using a structure in which the outer periphery of the suspension protrudes from the cover, the structure according to the present invention can prevent the housing from dropping due to a uniform load and also prevent the housing from falling due to a non-uniform load. This is because the projecting outer periphery of the housing covers the displacement of the suspension that occurs when an uneven load is applied, and it is possible to improve the stable load resistance regardless of the mounting position in the mounting housing. Become. Further, since the external stress is received by the suspension, it is possible to maintain high durability even in a usage situation where the external stress repeatedly acts.
　以上述べた効果に加えて、本発明記載の多機能型振動アクチュエータはサスペンション構造を用いて前記作用効果を付与しており、新たな部品を必要としない構造となっている。この為、従来の構造が有していた薄型化等の利点を残したまま、耐荷重性を向上することができる。 In addition to the effects described above, the multi-function vibration actuator according to the present invention has a structure that does not require a new part by providing the above-described effects using a suspension structure. For this reason, it is possible to improve the load resistance while retaining the advantages such as thinning that the conventional structure has.
　また、本発明の第二の態様に記載した構造を用いることで、ハウジングがサスペンションによって補強された状態になる。この為、前記外部応力によるハウジングの脱落防止と共に、全体的な剛性を高めることが可能となる。 Also, by using the structure described in the second aspect of the present invention, the housing is reinforced by the suspension. For this reason, it is possible to increase the overall rigidity while preventing the housing from falling off due to the external stress.
本発明の最良の実施形態にて用いる多機能型振動アクチュエータの全体斜視図Overall perspective view of multifunctional vibration actuator used in the best mode of the present invention 図１のＡ－Ａ’断面に於ける側断面図1 is a cross-sectional side view taken along the line A-A 'of FIG. 本発明の最良の実施形態にて用いる多機能型振動アクチュエータの分解斜視図1 is an exploded perspective view of a multi-function vibration actuator used in the best embodiment of the present invention. 図２に於ける突出部周辺の拡大図Enlarged view around the protrusion in Fig. 2
　以下に、図１及び図２、図３を用いて、本発明に於ける最良の実施形態を示す。 Hereinafter, the best embodiment of the present invention will be described with reference to FIG. 1, FIG. 2, and FIG.
　図１に本実施例に於いて用いる多機能型振動アクチュエータの全体斜視図を、図２に図１のＡ－Ａ’断面での側断面図を、図３に分解斜視図を、そして図４に図２の突出部周辺に於ける拡大図をそれぞれ示す。尚、図２について一部背景線は省略して記載した。 1 is an overall perspective view of the multi-function vibration actuator used in the present embodiment, FIG. 2 is a side sectional view taken along the line AA ′ of FIG. 1, FIG. 3 is an exploded perspective view, and FIG. Fig. 2 shows an enlarged view around the protrusion in Fig. 2. In FIG. 2, some background lines are omitted.
　図１、図２、及び図４から解るように、本実施例に於いて用いる多機能型振動アクチュエータは、カバー１１からサスペンション５の突出部Ｃ及びハウジング４を突出させた構造となっている。この為、厚み方向の荷重が加わった際に、サスペンション５が荷重を受けると共に、不均等荷重を加えた際の撓みによって生じるハウジング４のカバー１１に対する落ち込みを突出部Ｃによって防ぐことが可能となった。 1, 2, and 4, the multifunction vibration actuator used in the present embodiment has a structure in which the protruding portion C of the suspension 5 and the housing 4 are protruded from the cover 11. For this reason, when the load in the thickness direction is applied, the suspension 5 receives the load, and the protrusion C can prevent the housing 4 from dropping due to the bending when the uneven load is applied. It was.
　また、図２及び図３から解るように本実施例に於いて用いる多機能型振動アクチュエータは、ダイアフラム２、ボイスコイル３からなる音響再生部と、ポールピース６、マグネット７、ヨーク８、分銅９からなり、サスペンション５を介してハウジング４に支持された磁気回路部との間に働く磁気力によって駆動するダイナミック構造となっている。また、マグネット７は厚み方向に着磁しており、ポールピース６、ヨーク８及びサスペンション５の材質には磁性体を用いた。この為、本実施例記載の多機能型振動アクチュエータは、ボイスコイル３への入力信号をダイアフラム２の振動周波数帯域とすることで音響再生を行い、サスペンション５を介して支持された前記磁気回路部の振動周波数帯域とすることで体感振動の発生を行う駆動構造となっている。 2 and 3, the multi-function vibration actuator used in the present embodiment includes a sound reproducing unit including a diaphragm 2 and a voice coil 3, a pole piece 6, a magnet 7, a yoke 8, and a weight 9. And has a dynamic structure driven by a magnetic force acting between the suspension 5 and a magnetic circuit portion supported by the housing 4. The magnet 7 is magnetized in the thickness direction, and magnetic materials are used for the pole piece 6, the yoke 8, and the suspension 5. For this reason, the multi-function vibration actuator described in the present embodiment reproduces sound by setting the input signal to the voice coil 3 to the vibration frequency band of the diaphragm 2 and supports the magnetic circuit unit supported via the suspension 5. The vibration structure is a drive structure that generates a sensation vibration by setting the vibration frequency band of.
　また、本実施例記載の構造では、ダイアフラム２の固定に関して、グリル１とハウジング４とで挟んで取り付けた構造を用いている。このような構造としたことで、本実施例記載の構造ではダイアフラム接着時のバラツキを抑え、安定した固着強度による良好な音響再生を行うことができた。加えて、ダイアフラム外周部にグリル１を取り付けたことで、取付筐体への組み込み時に於ける取付筐体内壁とダイアフラム２との接触を無くし、音響再生時の音圧低下を防ぐ構造となっている。 Further, in the structure described in the present embodiment, a structure in which the diaphragm 2 is fixed and sandwiched between the grill 1 and the housing 4 is used. By adopting such a structure, the structure described in this example could suppress the variation at the time of diaphragm bonding and perform good sound reproduction with a stable fixing strength. In addition, by attaching the grill 1 to the outer periphery of the diaphragm, the structure prevents the inner wall of the mounting housing and the diaphragm 2 from being brought into contact with each other when assembled in the mounting housing, thereby preventing a decrease in sound pressure during sound reproduction. Yes.
　また、図２から解るように、本実施例で用いる磁気回路部は、音響再生部に設けたボイスコイル３をポールピース端部－サスペンション５内周で形成する磁気空隙ｇに配置している。この為、音響再生及び振動発生時に於いて高い磁気効率で駆動することが可能となった。加えて、ヨーク８の形状について、体感振動発生時に於けるサスペンション５の変形量に対応した段部を設けている。この為、サスペンション５の可動範囲を狭めることなく、全体的に薄型の構成とすることができた。 Further, as can be seen from FIG. 2, in the magnetic circuit unit used in this embodiment, the voice coil 3 provided in the sound reproducing unit is disposed in the magnetic gap g formed by the pole piece end portion and the inner periphery of the suspension 5. For this reason, it becomes possible to drive with high magnetic efficiency at the time of sound reproduction and vibration generation. In addition, with respect to the shape of the yoke 8, a step portion corresponding to the deformation amount of the suspension 5 at the time of experiencing vibration is provided. For this reason, the overall configuration can be reduced without narrowing the movable range of the suspension 5.
　また、本実施例では分銅９をヨーク８下側の段部形状に合わせて形成し、固着している。この為、従来の円筒形分銅よりも固着面積が増加し、落下等の衝撃時に於ける分銅の脱落を減少させることが可能になった。加えて、サスペンション５の固定箇所をヨーク上側に設定したことで、サスペンション５の内周を磁路として使用する構造とすることが可能となり、磁気回路部の薄型化と体感振動発生時の振幅増加という効果をも得ることができた。 Further, in this embodiment, the weight 9 is formed in accordance with the shape of the step portion on the lower side of the yoke 8 and fixed. For this reason, the fixed area is increased as compared with the conventional cylindrical weight, and it is possible to reduce the drop-off of the weight at the time of impact such as dropping. In addition, by setting the fixed portion of the suspension 5 on the upper side of the yoke, it is possible to use a structure in which the inner periphery of the suspension 5 is used as a magnetic path, making the magnetic circuit portion thinner and increasing the amplitude when experiencing vibrations. I was able to get the effect.
　また、図２、図３及び図４から解るように、前記ハウジングと一体化したサスペンション外周部Ｄは磁気回路部に対応したハウジング部分の強度を補強する構造となっている。より具体的には、落下等の衝撃を受けた際に、サスペンション外周部Ｄに補強されたハウジング部分がヨーク鍔部Ｅに接触することで、磁気回路部とボイスコイル３との接触を防ぐ構造となっている。この為、上記磁気回路部単体としての耐衝撃性だけではなく、駆動機構全体としての耐衝撃性向上という効果をも得ることができた。 As can be seen from FIGS. 2, 3 and 4, the suspension outer peripheral portion D integrated with the housing has a structure for reinforcing the strength of the housing portion corresponding to the magnetic circuit portion. More specifically, a structure that prevents contact between the magnetic circuit portion and the voice coil 3 by the housing portion reinforced by the suspension outer peripheral portion D coming into contact with the yoke flange E when receiving an impact such as dropping. It has become. Therefore, not only the impact resistance of the magnetic circuit unit alone but also the effect of improving the impact resistance of the entire drive mechanism can be obtained.
　以上述べた効果に加えて、図１及び図２から解るように、本実施例記載の構造では磁気回路部下側の空間について、カバー内壁と磁気回路部外周との隙間ｆを狭めることによって内部での空気流量を制限した構造となっている。この為、磁気回路部下側の空気をダンパとして使用することが可能となり、体感振動発生時の振動特性を安定させることが可能となった。 In addition to the effects described above, as can be seen from FIGS. 1 and 2, in the structure described in this embodiment, the gap f between the inner wall of the cover and the outer periphery of the magnetic circuit portion is reduced in the space below the magnetic circuit portion. The air flow rate is limited. For this reason, it becomes possible to use the air under the magnetic circuit part as a damper, and to stabilize the vibration characteristics when the sensation vibration is generated.
　以上述べた様に、本実施例記載の構造を用いることで、薄型化と耐衝撃性とを向上させたまま、耐荷重性の向上が可能な多機能型振動アクチュエータを得ることができる。
As described above, by using the structure described in this embodiment, it is possible to obtain a multi-function vibration actuator capable of improving the load resistance while reducing the thickness and impact resistance.
１　グリル
２　ダイアフラム
３　ボイスコイル
４　ハウジング
５　サスペンション
６　ポールピース
７　マグネット
８　ヨーク
９　分銅
１０　端子
１１　カバー
Ｃ　突出部
Ｄ　サスペンション外周部
Ｅ　ヨーク鍔部
ｆ　隙間
ｇ　磁気空隙 DESCRIPTION OF SYMBOLS 1 Grill 2 Diaphragm 3 Voice coil 4 Housing 5 Suspension 6 Pole piece 7 Magnet 8 Yoke 9 Weight 10 Terminal 11 Cover C Protrusion D Suspension outer periphery E Yoke collar part f Gap g Magnetic gap

Claims (2)

  1. 　マグネットを有する磁気回路部を板状のサスペンションによってハウジングに支持し、前記磁気回路部を収納するカバーを前記ハウジングに固着したダイナミック構造の多機能型振動アクチュエータであって、
    　前記サスペンションの外周を前記カバーから外側に突出させた多機能型振動アクチュエータ。     A multi-function vibration actuator having a dynamic structure in which a magnetic circuit portion having a magnet is supported on a housing by a plate-like suspension, and a cover for housing the magnetic circuit portion is fixed to the housing,
    A multifunction vibration actuator in which an outer periphery of the suspension is protruded outward from the cover.
  2. 　前記サスペンション外周部が、ハウジングと一体に成型されている、請求項１記載の多機能型振動アクチュエータ。 The multi-function vibration actuator according to claim 1, wherein the suspension outer peripheral portion is molded integrally with the housing.
PCT/JP2012/057687 2011-03-30 2012-03-26 Load-resisting structure of multifunctional vibration actuator WO2012133266A1 (en)

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